Pipe inner circumferential weld pressure test tool and pressure test method

Abstract

The invention discloses a pipe inner circumferential weld pressure test tool. The pipe inner circumferential weld pressure test tool comprises a cylindrical pressure test body (4), wherein a plurality of pulley blocks (5) are respectively arranged at the peripheries of two ends of the pressure test body (4) at intervals along the circumference; two rubber sealing rings (3) are arranged at the periphery of the pressure test body (4) at interval in the axial direction; the interior of each rubber sealing ring (3) is provided with an annular cavity; a hydraulic pipeline, an air exhaust pipeline and a water injection pipeline are arranged at one end of the pressure test body, the hydraulic pipeline is communicated to the inner annular cavity of one rubber sealing ring (3), and the air exhaust pipeline and the water injection pipeline are communicated to the outer wall surface of one section of pressure test body between the two rubber sealing rings (3). The invention also discloses a pipe inner circumferential weld pressure test method. Compared with the conventional pipeline integral pressure test method, the pipe inner circumferential weld pressure test method has the advantages that the pressure test range and the water injection amount required by a pressure test are greatly reduced, the working efficiency of the weld pressure test is improved, and the safety and reliability of the weld pressure test are enhanced; the problem of difficulty in a whole pressure test on a circumferential weld produced by new welding in the maintenance operation of a produced pipeline is solved.

Description

technical field [0001] The invention belongs to the technical field of welding seam pressure testing tools, and in particular relates to a pressure testing tool and a pressure testing method for inner pipe girth welding seams. Background technique [0002] The conventional girth weld pressure test is carried out by installing blind plates or pipe caps at both ends of the pipeline, and the overall pressure inside the pipe is carried out. This method has a large pressure test range and requires a large amount of water injection, so the pressure test efficiency is low and the pressure test risk is high. . [0003] The purpose of the foregoing discussion is to introduce the reader to various aspects of the technology that may be related to various aspects of the present invention that will be described and / or claimed below. It is believed that the discussion will help provide background information for the reader to facilitate a better With the various aspects of the present in...

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Problems solved by technology

[0002] The conventional girth weld pressure test is carried out by installing blind plates or pipe caps at both ends of the pipeline, and the overall pressure inside the pipe is carried out. This method has a large pressure test range and requires a large amount of water injection, so the pressure test efficiency is low and the pressure test risk is high.

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